I can think of over a billion reasons why that will never happen.
I think the only reason that will ever happen is if they can't fix all the major glitches with MDE and MB. I do think they will be able to get a lot of the IT problems worked out. If not, they may not have a choice at some point-because at least when we were there with MDE hardly working in the parks; the park wireless being unable to handle the load, MBs glitching right and left, huge guest services lines, and lots of stressed out looking CMS and guests, I don't think they can keep it that way. I don't see that happening though. They have an IT nightmare and they are probably sinking a ton more money in it- but I think they will ultimately resolve most of the IT issues. Maybe I am overly optomistic there though.
I do think they will continue tweaking and changing FP+ as the complaints continue rolling in. Honestly, I would like to see FP+ limited to 1 advance, and then once you get into the park you can add 1 additional one with your smart phone or at a kiosk, and then the rest of the day it works like FP- where after a set amount of time, you can get another for the rest of the day. Of course- that would be contingent on them actually fixing the wifi and MDE where you can actually get them to work in the parks!
(As for those who think only the minority dislike it- that was not our experience on our visit. We saw consistently large Guest Services Lines and concierge lines with complaining people; stressed out CMs (some so stressed out they actually admitted some opinions about it to guests which they clearly aren't supposed to be doing right now); irritated people in line to use the MB readers; and where there used to be friendly chatter and conversations on the buses, in lines, and waiting for shows, it was now almost always someone talking and complaining about their MB/MDE/FP+ nightmare. It was really a different feeling trip for us. Also, just because people weren't complaining, didn't mean they liked it. We hated MDE and were not fans of FP+ other than for the first one of the day (to our surprise we liked the MBs themselves)- but we weren't complaining or voicing our opinions to any CMs on the trip, nor did we initiate the conversations with others about it. We may have participated in some discussions in buses, lines, or during waits with other guests, or said something to someone who we observed having trouble with it-but it was always someone else or some problem they were having that prompted it. I would say that the majority of people who like it are the first timers (if they don't experience major glitches) because they do not know any better. My guess would be of the people who make trips annually, or even every couple of years, the majority don't like MDE/FP+ in its current form.)